Contact Force
The perpendicular pressure exerted between an ablation catheter tip and cardiac tissue, measured in grams.
Full Definition
Contact force refers to the perpendicular pressure applied between the tip of an ablation catheter and the cardiac tissue surface, typically measured in grams. Modern ablation catheters incorporate contact force sensors that provide real-time feedback to operators during procedures. Optimal contact force (usually 10-30 grams) is essential for creating effective lesions while avoiding complications such as perforation or steam pop. Contact force data is often integrated with force-time integral calculations to ensure adequate lesion formation and improve procedural outcomes.
Usage
Usage note: Measured in grams, not pounds or newtons. Critical for lesion quality assessment.
In Context
- "Contact force was maintained between 15-25 grams throughout the posterior wall isolation." — Procedural report
- "Poor contact force readings prompted catheter repositioning before energy delivery." — Ablation log